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Probing Outer Planet Storms

20 Feb 2018, 15:46 UTC
Probing Outer Planet Storms NASA

A Hubble project called Outer Planet Atmospheres Legacy (OPAL) has been producing long-term information about the four outer planets at ultraviolet wavelengths, a unique capability that has paid off in deepening our knowledge of Neptune. If you kept pace with Voyager 2 at Neptune, you’ll recall that the spacecraft found huge dark storms in the planet’s atmosphere. Neptune proved to be more atmospherically active than its distance from the Sun would have suggested, and Hubble found another two storms in the mid-1990’s that later vanished.

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